Materials Data on Rb2Cu2I4O by Materials Project
Rb2Cu2OI4 crystallizes in the orthorhombic P2_12_12_1 space group. The structure is three-dimensional. there are two inequivalent Rb1+ sites. In the first Rb1+ site, Rb1+ is bonded in a distorted single-bond geometry to one O2- and seven I1- atoms. The Rb–O bond length is 2.77 Å. There are a spread of Rb–I bond distances ranging from 3.70–3.96 Å. In the second Rb1+ site, Rb1+ is bonded in a distorted single-bond geometry to one O2- and six I1- atoms. The Rb–O bond length is 2.78 Å. There are a spread of Rb–I bond distances ranging from 3.66–3.87 Å. There are two inequivalent Cu2+ sites. In the first Cu2+ site, Cu2+ is bonded to four I1- atoms to form edge-sharing CuI4 tetrahedra. There are a spread of Cu–I bond distances ranging from 2.60–2.67 Å. In the second Cu2+ site, Cu2+ is bonded to four I1- atoms to form edge-sharing CuI4 tetrahedra. There are a spread of Cu–I bond distances ranging from 2.61–2.67 Å. O2- is bonded in a distorted bent 120 degrees geometry to two Rb1+ and three I1- atoms. There are a spread of O–I bond distances ranging from 3.51–3.78 Å. There are four inequivalent I1- sites. In the first I1- site, I1- is bonded in a 5-coordinate geometry to three Rb1+ and two Cu2+ atoms. In the second I1- site, I1- is bonded in a 6-coordinate geometry to three Rb1+, two Cu2+, and one O2- atom. In the third I1- site, I1- is bonded in a 6-coordinate geometry to three Rb1+, two Cu2+, and one O2- atom. In the fourth I1- site, I1- is bonded in a 7-coordinate geometry to four Rb1+, two Cu2+, and one O2- atom.